| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| ******************************************************************************/ |
| package org.apache.olingo.odata2.client.core.ep.serializer; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Map; |
| |
| import org.apache.olingo.odata2.api.edm.Edm; |
| import org.apache.olingo.odata2.api.edm.EdmException; |
| import org.apache.olingo.odata2.api.edm.EdmFacets; |
| import org.apache.olingo.odata2.api.edm.EdmLiteralKind; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleType; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleTypeException; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleTypeKind; |
| import org.apache.olingo.odata2.api.edm.EdmType; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.client.api.ep.Entity; |
| import org.apache.olingo.odata2.core.ep.EntityProviderProducerException; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityComplexPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.util.FormatJson; |
| import org.apache.olingo.odata2.core.ep.util.JsonStreamWriter; |
| |
| /** |
| * Producer for writing a single simple or complex property in JSON, also usable |
| * for function imports returning a single instance of a simple or complex type. |
| * |
| */ |
| public class JsonPropertyEntitySerializer { |
| |
| /** |
| * Serializes a property of every entry in json payload |
| * @param writer |
| * @param propertyInfo |
| * @param value |
| * @throws EntityProviderException |
| */ |
| public void append(final Writer writer, final EntityPropertyInfo propertyInfo, final Object value) |
| throws EntityProviderException { |
| JsonStreamWriter jsonStreamWriter = new JsonStreamWriter(writer); |
| |
| try { |
| jsonStreamWriter.beginObject() |
| .name(FormatJson.D) |
| .beginObject(); |
| |
| jsonStreamWriter.name(propertyInfo.getName()); |
| appendPropertyValue(jsonStreamWriter, propertyInfo.isComplex() ? (EntityComplexPropertyInfo) propertyInfo |
| : propertyInfo, value, true); |
| |
| jsonStreamWriter.endObject() |
| .endObject(); |
| } catch (final IOException e) { |
| throw new EntityProviderProducerException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } catch (final EdmException e) { |
| throw new EntityProviderProducerException(e.getMessageReference(), e); |
| } |
| } |
| |
| protected static void appendPropertyValue(final JsonStreamWriter jsonStreamWriter, |
| final EntityPropertyInfo propertyInfo, final Object value, |
| boolean validatingFacets) throws IOException, EdmException, |
| EntityProviderException { //NOSONAR |
| if (propertyInfo.isComplex()) { |
| if (value == null || value instanceof Map<?,?>) { |
| jsonStreamWriter.beginObject(); |
| appendPropertyMetadata(jsonStreamWriter, propertyInfo.getType()); |
| if (value == null) { |
| jsonStreamWriter.endObject(); |
| return; |
| } |
| for (final EntityPropertyInfo childPropertyInfo : ((EntityComplexPropertyInfo) propertyInfo) |
| .getPropertyInfos()) { |
| final String name = childPropertyInfo.getName(); |
| if ( !((Map<?,?>)value).containsKey(name)) { //NOSONAR |
| continue; |
| } |
| jsonStreamWriter.separator(); |
| jsonStreamWriter.name(name); |
| appendPropertyValue(jsonStreamWriter, childPropertyInfo, |
| value == null ? null : ((Map<?,?>) value).get(name), validatingFacets); //NOSONAR |
| } |
| jsonStreamWriter.endObject(); |
| } else { |
| throw new EntityProviderProducerException(EntityProviderException.ILLEGAL_ARGUMENT |
| .addContent("A complex property must have a Map as data")); |
| } |
| } else { |
| final EdmSimpleType type = (EdmSimpleType) propertyInfo.getType(); |
| final Object contentValue = value instanceof Entity ? ((Entity) value). |
| getProperties().get(propertyInfo.getName()) : value; |
| final EdmFacets facets = validatingFacets ? propertyInfo.getFacets(): null; |
| String valueAsString = null; |
| try { |
| valueAsString = type.valueToString(contentValue, EdmLiteralKind.JSON, facets); |
| } catch (EdmSimpleTypeException e) { |
| throw new EntityProviderProducerException(EdmSimpleTypeException.getMessageReference( |
| e.getMessageReference()).updateContent(e.getMessageReference().getContent(), |
| propertyInfo.getName()), e); |
| } |
| switch (EdmSimpleTypeKind.valueOf(type.getName())) { |
| case String: |
| jsonStreamWriter.stringValue(valueAsString); |
| break; |
| case Boolean: |
| case Byte: |
| case SByte: |
| case Int16: |
| case Int32: |
| jsonStreamWriter.unquotedValue(valueAsString); |
| break; |
| case DateTime: |
| case DateTimeOffset: |
| // Although JSON escaping is (and should be) done in the JSON |
| // serializer, we backslash-escape the forward slash here explicitly |
| // because it is not required to escape it in JSON but in OData. |
| jsonStreamWriter.stringValueRaw(valueAsString == null ? null : valueAsString.replace("/", "\\/")); |
| break; |
| default: |
| jsonStreamWriter.stringValueRaw(valueAsString); |
| break; |
| } |
| } |
| } |
| |
| protected static void appendPropertyMetadata(final JsonStreamWriter jsonStreamWriter, final EdmType type) |
| throws IOException, EdmException { |
| jsonStreamWriter.name(FormatJson.METADATA) |
| .beginObject() |
| .namedStringValueRaw(FormatJson.TYPE, type.getNamespace() + Edm.DELIMITER + type.getName()) |
| .endObject(); |
| } |
| } |